Series SL-1 metering devices

For use in single-line lubrication systems

The series SL-1 metering devices are for single-line, high-pressure centralized lubrication systems dispensing lubricants compatible with flouroelastomer packings and viscosity up to NLGI 2. Output is externally adjustable. An indicator pin permits visual check of metering device operation. Individual metering devices can be removed easily for inspection or replacement. Available in stainless steel SAE 316, for applications where environmental conditions are hazardous to carbon steel or in industries preferring stainless steel.

Features and benefits

• Shipped with manifolds from 1 to 6 ports (lubrication points)
• Output is externally adjustable
• Each indicator pin permits visual check of injector operation
• Individual metering devices can be removed easily for inspection or replacement
• Includes fitting for feed lines via alternate outlet port
• Available in stainless steel SAE 316

Applications

• Mining and mineral processing
• Construction machinery, steel/heavy industry

TECHNICAL DATA

Function principle: metering device

Outlets: 1 to 6

Metering quantity: adjustable0 016-1,31 cm³, 0.001-0.08 in³

Lubricant grease: NLGI 0, 1, 2

Operating temperature: -26 to +176 °C, -15 to +350 °F

Operating pressure: 127-240 bar, 1850-3500 psi

Relief pressure: 41 bar, 600 psi

Material: carbon steel, stainless steel 316

Connection main line: 3/8 NPTF (F)

Connection outlet: 1/8 NPTF (F)

Lubricant points: olderless pipe connection

Dimensions:

min. 63 × 179,4 × 52,4 mm
max. 203 × 179,4 × 52,4 mm

min. 2.5 × 7.0 × 2.0 in
max. 8.0 × 7.0 × 2.0 in

Mounting position: any

Operation

Stage 1

The injector piston is in its normal or rest position. The discharge chamber is filled with lubricant from the previous cycle.

Under the pressure of incoming lubricant, the slide valve is about to open the passage leading to the measuring chamber above the injector piston.

Stage 2

When the slide valve uncovers the passage, lubricant is admitted to the measuring chamber above the injector piston which forces lubricant from the discharge chamber through the outlet port to bearing.

Stage 3

As the injector piston completes its stroke,

it pushes the slide valve past the passage, cutting off further admission of lubricant to the passage and measuring chamber. The injector piston and slide valve remain in this position until lubricant pressure in the supply line is vented (relieved at the pump).

Stage 4

After venting, the injector spring expands, causing the slide valve to move, so that the passage and discharge chamber are connected by a valve port. Further expansion of the spring causes the piston to move upward, forcing the lubricant in the measuring chamber through the passage and valve port to refill the discharge chamber.

The injector is now ready for the next cycle.